Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"superlattice structure"”.
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Synthesis, Characterization and Properties of Nanostructured Materials by Template-Directed Method
… been investigated to make striped nanowires with superlattice structure. Various methods have been used to characterize these nanomaterials, including SEM, FESEM TEM, STM and Optical Microscope. The aggregation of the nanowires and their alignment under the magnetic force were observed under the …
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Giant magnetoresistance in electrodeposited nickel-copper and cobalt-copper multilayers.
… predictions, in order to determine the superlattice structure and electromagnetic properties of each. The results demonstrate that the replacement of nickel by cobalt significantly enhances the GMR effect and that the magnitude of this effect is related to the copper, or non-magnetic, …
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Optical properties of GaAs coupled quantum wells and superlattices: electric and magnetic field effects
… of GaAs/ AlGaAs coupled quantum wells and superlattices are investigated and their potential application in optical modulation demonstrated. Quenching and enhancement of excitonic absorption peaks is achieved at low bias fields of the order of 10 -60 kV /em for the asymmetric GaAs/ AlGaAs …
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The application of scanning tunneling microscopy (STM) and related techniques to the study of organic and biomolecular targets
… of the previously reported $p\times\surd3$ superlattice structure is observed on these surfaces; using this nomenclature, the basic repeat unit of the structure reported herein corresponds to a $7\times\surd3$ superlattice. The study of sub-monolayer films shows the island-like formations of …
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Direct Templating of Semiconductor Nanostructures With Lyotropic Liquid Crystals
… film templating, a thin film with a defined nanostructure. In both systems, the structure and symmetry of the features in the resultant material are an exact match with the characteristic dimension of the precursor liquid crystal. Various nanoscale semiconducting superlattices were generated by …
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Epitaxial growth and plasmonic coupling in topological insulator heterostructures
… of TI, we are able to create functional TI heterostructures like superlattice. In single TI thin film, Dirac plasmons are excited simultaneously on the top and bottom surfaces. They are electrostatically coupled and generate an optical mode and an acoustic mode. It is not clear if the multiple …
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Properties and device applications of silicon and silicon-germanium nanostructures with different dimensions
Defect-free crystalline Si/SiGe(Ge) nanostructures are demonstrated despite the 4% lattice mismatch between Si and Ge. The lattice mismatch-induced strain is sufficiently relaxed through the designed, cluster morphology, or nanowire (NW) structures. Future device applications of these nano …
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Engineering Topological Quantum Matter with Patterned Light
… particular, we investigate a way to imprint the superlattice structure in the two-dimensional electronic systems by shining circularly-polarized light. We demonstrate the wide optical tunability of this system allows one to realize a wide variety of band properties. We show that these tunable …
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Niobium-tantalum superlattices grown by beam epitaxy: Structure, transport and superconducting properties
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-09T19:51:05Z No. of bitstreams: 1 1983_durbin.pdf: 5624003 bytes, checksum: f4a556b84b6d6143e82beb6d5b0669dc (MD5)